>From: Arnold Krille <arnold(a)arnoldarts.de>
>
>> Next I will attempt to write a nonlinear reverb. Useful for
>> drums and vocals as well. Something new if nobody already has
>> written one.
>
>Like the TAP Reverberator? Which has several different engines/methods...
No, I don't think so. TAP Reverberator looks like old comb/allpass
reverberator. The reverbs I'm refering to were responsible for
the familiar drum reverbs 20 years ago.
Juhana
--
http://music.columbia.edu/mailman/listinfo/linux-graphics-dev
for developers of open source graphics software
Hmm... I noticed CAPS plugins already have the Dattorro's plate
reverb. It is the vocal reverb I implemented now, as I thought
there was an urgent need for one. Does nobody use CAPS plate reverb
for vocals? Its design is of Lexicon type!!
However, I added early reflections and I'm prepared to write true
stereo-to-stereo version (CAPS is simply summing left and right
channels to mono).
Next I will attempt to write a nonlinear reverb. Useful for
drums and vocals as well. Something new if nobody already has
written one.
Juhana
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http://music.columbia.edu/mailman/listinfo/linux-graphics-dev
for developers of open source graphics software
I have now written a vocal reverb. It needs a pluginization.
An example would do fine but the example must be exactly
what I need, otherwise it may just confuse me. Latest plugin
stuff, of course.
Unlike GVerb, the new reverb has a preset structure. The reverb
is initialized this way:
effect = effect_new(config_ptr,preset_ptr);
The preset structure can be modified during the processing
by switching the pointer or by modifying the parameters
in the structure.
The audio is processed by calling
effect_do(effect, input_array, count, outleft_array, outright_array);
I'm also glueless with the following:
1. Denormalization. Feeding noise at the reverb input would
save me trouble of finding all places where the problem
occurs, but is this wise? How to generate the proper noise?
2. Effect modulation is done by two extra arrays at
effect_do( ..., mod1_array, mod2_array, ...)
They should be filled with slowly varying sin() signals, but
how to do it efficiently? I have used earlier the sin() call.
3. The audio is divided to blocks of N samples. Apparently
I should interpolate the tweaked parameters over the N samples
inside the reverb, or I should provide arrays for all parameters
and leave the interpolation to the plugin wrapper.
Juhana
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http://music.columbia.edu/mailman/listinfo/linux-graphics-dev
for developers of open source graphics software
Hello. I just finished writing and documenting a new lossless and lossy audio codec called
j2kaudio. It uses the wavelet compression in JPEG 2000 to transcode audio wav data to and from j2a
files. I have not written any sort of media player plugin yet; more testing and file format
refinement are necessary first.
I tested with 44100Hz, 16-bit, stereo CD-quality wav files, but it also supports other sample
rates, precisions, and channel numbers.
I tested against flac, lpac, shorten, and monkey's audio for lossless encoding. j2kaudio beat the
nearest competition by over 10%.
If anyone is motivated to test some additional songs, provide me with additional test data, or
suggest another untested codec, please let me know.
http://geocities.com/hildstrom/projects/j2kaudio/index.html
Let me know what you think. Thanks. -Greg
Gregory Alan Hildstrom
Secure Systems Engineer - Trusted Computer Solutions
trustedcs.com
ghildstrom(a)trustedcs.com
Software Engineer - Hildstrom Engineering
geocities.com/hildstrom
hildstrom(a)yahoo.com
Mobile:(210)413-6082
Fax:(210)599-0469
Office:(210)340-3151x117
PHASEX-0.11.1 contains fixes for the segfault issues some users have
seen with version 0.11.0. Special thanks goes to Adam Sampson for
tracking this down, and to the rest of you who sent in bug reports.
Upgrading to 0.11.1 is recommended for all users, since it appears
that this bug will corrupt memory used by the synth engine even if
it doesn't trigger a segfault.
As usual, source tarballs and FC6 RPMs (src, i386, i686, and athlon)
are available at:
http://sysex.net/phasex
Thank you for your continued support. Here's to happy music-making
under Linux!
Cheers,
--ww
--
/* William Weston <weston(a)sysex.net> */
Version 0.11.0 of the [P]hase [H]armonic [A]dvanced [S]ynthesis
[EX]periment is ready for download (source tarball and FC6 RPMs) at:
http://sysex.net/phasex/
This release contains many fixes and improvements and is highly
recommended for all PHASEX users. Here's a brief list (see the
ChangeLog for more details):
Engine fixes: Filters and oscillator bandlimiting are now properly
tuned (taking into account filter oversampling) and work as
documented. Calculations for lookup tables are more accurate. The
envelope curve has been improved and sounds a lot more natural.
Additional bugfixes are found in the ALSA MIDI startup and JACK
shutdown code.
Engine optimizations: A few simple optimizations have been worked
out, with an average of about 30% CPU cycle reduction per voice, and
about 30MB of memory overall. For custom builds, the engine can
easily be fine-tuned in phasex.h, and the --enable-arch= configure
option supports all x86 CPU types supported by gcc-4.1.2.
Improved patch bank: The entire bank is preloaded into memory.
There is now support for patches in alternate directories. The
memory modes have been reworked (and finally documented in the
runtime help system). Multiple patches from a directory may now be
loaded into the patch bank at once.
GUI updates: Special thanks goes out to Pete Shorthose for providing
the initial backing store code and some pearls of GTK wisdom to make
window redrawing and tab switching faster and smoother. For those
of you who haven't done so already, now would be a good time to
enable backing store in your X server.
Knob and control updates: Scroll wheel support has been added to
the knobs and alternate controls. Middle-click centering of knobs
is more responsive. The cumbersome combobox lists have been changed
to detent knobs with clickable value labels.
Parameter locking: Parameters can now be locked down to their
current values, effectively blocking out program changes, patch
loads, and MIDI controller messages on a per-parameter basis.
New settings: The base A4 tuning frequency and backing store can
now be set in the preferences dialog.
Cheers!
--ww
--
/* William Weston <weston(a)sysex.net> */
Hi,
Announcing the latest release to the quicktoots archive.
DJing with Freewheeling & Hydrogen.
DJing is an artform and freewheeling with JACK on Linux makes it
possible to amaze your audience with live remixes of rare cuts and
hidden gems that when put together produce sample Heaven...
Ringheims Auto shows us how it's done.
http://quicktoots.linuxaudio.org
As always we would love to have more submissions on new ways to use the
latest tools. If you are interested in having your name up in lights let
me know.
-----------------------
Background:
The purpose of the Quicktoots are to provide a community resource of
informative guides for using Linux audio applications.
The Quicktoots are the brainchild of Dave Phillips the man responsible
for the most comprehensive webpage devoted to Linux audio applications.
The Linux Sound and Midi page. This has now been taken over by the
community and moved to the Linux-Sound Application Index your one stop
resource for Linux sound software.
http://apps.linuxaudio.org/
If you are in the position to link to any of the quicktoots please link
to the main page. That way we can keep more accurate statistics on the
amount of people viewing the pages.
If you are interested in contributing to the Quicktoots please let us
know. All work must be submitted me and we I will give advice or make
changes to ensure our publishing standard is met. If you are not able to
send html don't worry because I am willing to format any braindumps.
Enjoy.
-----------------------
Cheers.
--
Patrick Shirkey - Boost Hardware Ltd.
Http://www.boosthardware.comHttp://lau.linuxaudio.org - The Linux Audio Users guide
========================================
"Anything your mind can see you can manifest physically, then it will
become reality" - Macka B
Mammut 0.60
===========
Mammut will FFT your sound in one single gigantic analysis (no windows).
These spectral data, where the development in time is incorporated in
mysterious ways, may then be transformed by different algorithms prior to
resynthesis. An interesting aspect of Mammut is its completely
non-intuitive sound transformation approach.
*Homepage:
http://www.notam02.no/arkiv/doc/mammut/
*Screenshot:
http://www.notam02.no/arkiv/doc/mammut/mammut.png
Changes 0.59 -> 0.60
-Updated source to work with Juce 1.44. (later or earlier versions of
juce might not work with this version of mammut)
-Fixed a couple of ugly bugs in the progress bar code.
-Set moving camera to be off by default. Moving camera seems to stall
mammut when using newer juce's. :-(
Snd-ls v0.9.8.1_beta
====================
Snd-ls is a distribution of Bill Schottstaedt's sound editor SND.
Its target is people that don't know scheme very well, and don't want
to spend too much time configuring Snd. It can also serve
as a quick introduction to Snd and how it can be set up.
(Its named beta, because it hasn't been tested that much. But I think it
should work very well. However, a new non-beta version is going to be
released quite soon with some additional fixes.)
Changes 0.9.7.12 -> 0.9.8.1_beta
-Fixed bug that caused snd to fail starting if no previously used
soundfile was opened during startup.
-Updated Snd from 8.4/12.9.2006 to 9.3/30.7.2007. Many important fixes.
-Another attempt at fixing the rt_readin_tag startup bug.
Download from http://www.notam02.no/arkiv/src/snd/
Hi,
I have some multi-threaded audio software that passes data around
using pointers to data structures. However, I'd like a more
generalized message passing system. The only requirements are that it
cannot block the sender or receiver (they are considered soft
'real-time'), and also that multiple senders should be able to send a
message to the same receiver at the same time (which makes
non-blocking circular buffers a difficult approach). I'm thinking of
designing something that uses atomic_ops to implement quick locking of
portions of a message queue.
Anyways, my idea is to use something like OSC for message passing, but
without the "path" part of the OSC address. (That is, the path is
already resolved, since threads share memory..)
Does anyone know if something like this has been done previously?
Ideally it would easily scale to inter-process communication, if in
the future I wanted to turn my threads into processes. (Another
reason for basing it on OSC..)
Does any of this make sense?
Basically I've been running into a lot of shared-memory threading
problems, which in retrospect should have been expected and avoidable
if I'd spent more time designing my message passing system. (At the
time I hadn't heard of the atomic_ops library.)
I might have designed the whole system to use timers instead of
threads and avoided a lot of headaches, but I wanted the threads to be
splittable across CPU cores. (Which arguably is a good reason to use
processes.. admittedly the whole thing is starting to point me towards
the "threads are a bad idea" camp.)
Cheers,
Steve
Dear list members,
ReplyTo munging is now deactivated on Linux-audio-dev and
Linux-audio-user. We now have a RFC compliant list.
To reply to the list, you may use the "reply to all" button of your
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Best regards,
__________________
Marc-Olivier Barre.
